On September 25th, 2011, Nik Cubrilovic, a hacker and writer, published a blog post that showed that a particular Facebook session cookie wasn't being deleted after a user logged out. He noted that the session cookie included your Facebook user id number, which would presumably facilitate Facebook associating any data they collected about your browsing the web with your Facebook account. Cubrilovic's review showed that, based on what the cookies were transmitting, Facebook could easily connect some of your browsing habits to your unique Facebook account. This set off a storm of media coverage, but much of it lacked a detailed analysis of what Facebook is actually tracking and an understanding of how this could influence pending privacy legislation in Congress.